Multi-constellation single base station receiver clock difference estimation method

Abstract

The invention discloses a multi-constellation single base station receiver clock difference estimation method. When multi-constellation data are in fusion process, positions of satellites when signals are emitted cannot be accurately confirmed due to different receiver clock differences among different constellations and the effect of delaying of signal propagation, error terms which are related to the satellite speed and caused by receiver clock differences still can cause changing of errors and affect an actual positioning effect, wherein the maximum error can reach 1m. In the calculation of the positions of the satellites, the receiver clock differences are estimated, the time delaying of the signal propagation is corrected, the receiver clock differences are resolved through a Kalman filtering method, and accordingly the method is practical and can obtain accurate geometrical distance between receivers with corrected receiver clock differences and the satellites. The method can reduce the effect of the receiver clock differences which are related to the satellite speed to a submillimeter level, is suitable for a receiver with clock jumping being one millisecond, and achieves high-accuracy positioning of the multi-constellation fusion.

Description

technical field [0001] The invention relates to the field of satellite positioning, in particular to a multi-constellation single reference station receiver clock error estimation method. Background technique [0002] GNSS network differential positioning technology is currently a popular technology in the field of satellite positioning. It is widely used in surveying and mapping, land and resources survey and other industries. The rise of network differential technology represented by Virtual Reference Station (VRS) technology enables the establishment of base station network GPS The service system has become the latest trend in the development of current GPS technology applications. As a GPS real-time dynamic positioning technology in a multi-reference station environment, VRS technology is a network RTK positioning technology integrating Internet technology, wireless communication technology, computer network technology and GPS technology. It is also the most widely used ...

AI Technical Summary

Problems solved by technology

However, due to the different receiver clocks designed by various manufacturers, some receivers have large receiver clock differences and even some receivers have a clock jump of 1 ms. Will produce a maximum error effect close to 1 meter, and cannot be eliminated or weakened in double difference

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